4987914 cummins 6L diesel engine piston. July Parts CCEC Diesel Engine Piston Parts 4987914 Piston kit. Condition: Used, in good condition, will have marks from day to day use. WHAT IS PICTURED IS WHAT YOU WILL RECEIVE. If the part number is a complete match then usually this is the correct part. If you are able to provide the vehicle VIN number, we can check the compatibility. Does not include remote areas. Kindly refer to updated DHL Remote Area list. After you have received your item in satisfactory condition, we would be grateful for your feedback. The item needs to be in its original condition and resellable.